Journalists in Nigeria have expressed disappointment after no questions were permitted at a meeting with Twitter CEO Jack Dorsey.
Mr. Dorsey arrived in Nigeria on Thursday, beginning a month-long trip to Africa during which he will also travel to Ethiopia, Ghana and South Africa.
BBC Nigeria correspondent Mayeni Jones said reporters were informed that a question-and-answer session with the Twitter CEO would not go ahead on Friday.
She said there appeared to be a mix-up, with the press not supposed to be invited to the event.
Instead, Mr. Dorsey had his photograph taken and left.